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An itinerary containing an ARNK
(arrival unknown, pronounced 'arunk') segment is one in which the travel
Travel is the movement of people or objects between relatively distant geographical locations. 'Travel' can also include relatively short stays between successive movements.-Etymology:...
er arrives at destination A but departs out of destination B. The arrival to destination B is unknown
, hence the name arrival unknown
. It is similar to an open-jaw ticket
An open-jaw ticket is an airline ticket in which a traveler returns to the airline from a city other than the one in which they arrived, or in which the final destination is not the same as the original departure city. The trip between these two cities is then made over land, sea or with a...
except that there is no variation in the point of origin
Point of origin may refer to:* Point of Origin * Point of Origin * "Point of Origin", an episode of season 5 of the US medical drama ER* "Point of Origin" * Point of Origin , 2004...
. The reason for this is that airline reservation systems (and major GDS') have to have the segments following on sequentially, so arriving at one city, and then departing from another, will cause the system to throw up an error message. The ARNK field tells the system that this is intentional.
An example of an itinerary that contains an ARNK segment is the following:
- Segment 1: 11-NOV: SFO/IAD (San Francisco to Washington-Dulles)
- Segment 2: ARNK: Arrival Unknown or Surface Transportation from IAD to PHL
- Segment 3: 15-NOV: PHL/SFO (Philadelphia to San Francisco)